Multiple Choice
Polystyrene often used as a consumable pattern material has a relative density of
A) 20 to 25 kg/m3
B) 2240 to 2500 kg/m3
C) 120 to 125 kg/m3
D) 1120 to 1125 kg/m3
Correct Answer:

Verified
Correct Answer:
Verified
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